MESON Chess Problem Database

Problem Display
PID: 149413 (4Q3/4PP2/1K1pk2P/6P1/7P/3P4/8/8 w - - 0 1)

Dehler, Ernst Georg

DSB, 1913

4Q3/4PP2/1K1pk2P/6P1/7P/3P4/8/8

#2

8 + 2

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qa4?
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Kxf7
        • 2.e8Q#
      • 1...d5!
    • 1.Qb5?
      • threat
        • 2.e8Q#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Kxf7
        • 2.e8Q#
      • 1...d5!
    • 1.Qa8?
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd7
        • 2.e8Q#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Kxf7
        • 2.e8Q#
      • 1...d5!
  • Keys
    • 1.Qc6!
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kxe7
        • 2.Qe8#
      • 1...Kxf7
        • 2.e8Q#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
        • K(b);P-FLIGHT::QAR1(H)
        • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(H)
        • K(b);S_FLIGHT,XP(G)::P=Q
      • Refutation
        • P(a);
    • Try
      • Q(H);
      • Threat
        • P=Q
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(H)
        • K(b);S_FLIGHT,XP(G)::P=Q
      • Refutation
        • P(a);
    • Try
      • Q(H);
      • Vars
        • K(b);P-FLIGHT::QAR1(H)
        • K(b);S_FLIGHT::QAB1(H)
        • K(b);S_FLIGHT::P=Q
        • K(b);OGATEB,P-FLIGHT,XP(F)::QAR1(H)
        • K(b);S_FLIGHT,XP(G)::P=Q
      • Refutation
        • P(a);
  • Actual
    • Q(H);P_PINP(a)
    • Vars
      • K(b);N_SPINP(a),P-FLIGHT::QAR1(H)
      • K(b);N_SPINP(a),S_FLIGHT::QAB1(H)
      • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XP(F)::QAR1(H)
      • K(b);N_SPINP(a),S_FLIGHT,XP(G)::P=Q
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